Occlusion surveying machine



Nov. 10, 1931. J. A. LINDELOV 1,831,390

OCCLUS ION SURVEYING MACHINE Original Filed May 24. 1920 2 Sheets-Sheet l Nov. 10, 1931. .1. A. LINDELOV 1,331,399

OCCLUSION SURVEYING MACHINE Original Filed May 24, 1920 2 Sheets-Sheet 2 EjW m I UH m w Patented Nov. 10, 1931 UNITED STATES PATENT OFFICE JOHANNES A. LINDELOV, OF NEW YORK,-N. Y.

OGCLUSION SURVEYING MACHINE Application filed May 24, 1920, Serial No. 383,790, Renewed August 12, 1927.

This invention relates to surveying machines for determining degrees of malocclu- The several advantages and the great ad- 1 Vance in the art to be obtained by my invention will become apparent as this specification proceeds.

Throughout the several views of the" draw ings, like or duplicate the same numerals.

Fig. 1 is a perspective view of an apparatus parts are denoted by I embodying the first part of my invention.-

Fig. 2 is a plan view of the second part of my invention with portions broken away to disclose structural features.

Fig. 3 is a view of a part of Fig. 2.

Fig. 4 is a modification of Fig. 3.

Fig. 5 is a view of part 1d of Fig. 1 when in raised position.

Fig. 6 is a cross section of Fig. 1 combined with the apparatus of Fig. 2, some parts being omitted to disclose the construction.

Fig. 7 is an enlargedperspectiveview of one arm member of Figs. 2 and 6.

Fig. 8 is a view of part of Fig. 7.

In the profession of dentistry where the correction of cases of malocclusion is concerned, the lack of means to arrive at absolute accuracy when determining the degree of movement necessary to relate the teeth in proper occlusion has caused much haphazard work and in general kept the art in the exthe described surveying machine is supported perimental stage.

It is herein proposed to introduce to the art a. combined occlusometer and surveying machine by virtue of whose construction perfectly accurate movements of teeth maybe forcasted and charts speedily drawn.

In the practice of my invention I employ a major arm 1 movably supported by asleeve which is supported partly by the post59 and more particularly by annular block 5 which is secured with said post to a base 2. The arm rests by ball contact on. the annular enlargement 4 bywhich the sleeve may be turned, and, as the lower end of the sleeve en-' gages the interior threads of block or collar 5, the rotation of part 4 will raise or lower the arm. A helical spring has been inserted in the upper part of sleeve 60 to eliminate vibration and to provide sufficient friction to prevent the sleeve from turning when arm 1 is moved.

A minor arm 3 is hinged to arm 1 by a pin 39 and is provided in its outer extremity with avertical sleeve 7 which may be secured in plunger will instantly be impelled upward by the coil spring 7 beneath it. so that the stylus will be held in contact with the underside of chart table 14. 4 Slot 53 is merelyclearance for the point of catch 9. The table is hinged to abar 55 to which is secured stud 56, the latter being supported in post 59. The height may be adjusted by screw 57. Normally, the table is secured in horizontal position by nut 15, but when the latter is to bereleased, the gable may be raised to vertical position as in ig. 5. I When a simple cast or set of teeth 13 is to be scribed and the follower 12 is caused to survey each tooth in contact therewith, the chart 61 will receive an outline of the teeth by the contact ofstylus 11 thereon, the arms 1 and 3 permitting free horizontal movements in all directions.

The occlusometer used in combination with extremities of which is secured an end block 7 26. l'ntermediately the rods pass through holes 43, 66 of a slidable feed block 41, upon which is mounted a tooth carriage 45 which straddles the bars by virtue of a slot 65. The

carriage has aside slot through the same into.

which the feed block fits snugly, with latitude for vertical movement. The meansfor moving the carriage vertically is shown as consisting of set screw 40 which contacts directly with block 41. The head of said screw is marked on the periphery to provide means in conjunction with pointer 47 for indicating the degree of movement imparted to the carriage by rotating saidscrew. At its lower end, the carriage is provided with a socket d6 adapted to receive the ball 33 of a tooth spit 31, shown in section as l6. The ball and socket arrangement provides means to set a tooth in vertical position if it is not so originally by merely releasing screw 48, and, after resetting the tooth, by tightening said screw.

However, a tooth 29 may be too far in. or

even behind other teeth, in which case the car-- riage bearing the offending tooth must bemoved directly outward. The means by which this may be performed consists of a feed shaft lying between and parallel with the horizontal rods which support the carriage. This feed shaft 64 is rotatable by means of a nut 27 and passes through end block 26 and carriage block 41. The nut is further provided with dial marks noted 63 to indicate the amount of movement of the block upon rotation of the nut and feed shaft.

It will be noted that plate 17 is provided with horizontal extensions as at 19, and plate 16 with similar extensions as at 18. The latter extensions of plate 16' support a bowed L bar 28 upon whose face is ruled series of index marks, said bar being adapted to coopcrate with pointer 44 to indicate any desired sidewise movement of the carriage member about pivot 42. The lower bar 24:, which corresponds wi h 28 illustrates this matter-fully in connection with the pointers 31, 31.

The actual operation of the apparatus is as follows. A pair of casts of the upper and lower teeth is made in moulds in such manner that a spit or point 34. is embedded in each tooth replica. If we consider the lowerset of teeth indicated at 3:2, in each case the point 3% has its bearing ball 33 pendent downward. and the latter may then be placed upon the lower carriage. approximately corresponding clips 52 and the table 14 secured.

depressing catch 9.

Owing to the amount of overhanging parts a large surveying follower 62 must be used,

and-,- bringing the point of the same into con Lactwith the teeth, annular portion li's turned to raise or lower the arm to the best surveying;

position.- If the teeth are now carefully sur-' veyed a chart of at 61.

The arm is swung aside and the teeth carefully sawed apart. thereafter manipulated and the members 38 all the teeth will result as The screws 25-,- 48- are swung till all the teeth assume a perfectly normal curve. t may be, however, that. some tooth is highor low, and this may be. remedied by turning a SCl'-W.tb7 carefully noting. the

marks on thehead asthey pass under pointer 51. The different new readings may now be recorded, and a new chart madcl Vhen the whole foregoing procedure has been carried out with the upper teeth, four comparative charts and accurate readings will, be at hand, so that the exact direction and extent of necessary movement 150F311) tooth will be known for both sets of teeth. 7

There is another simple means forsecuring a tooth to a ball and socket joint shown in Fig. at. Here 33 is the, ball. 35 is a vise whose inner j aw 37 is moved to grip a tooth in conjunction with the other vstationary when screw 36 is turned with a key.

. Having thus fully described my invention,

1. A dental surveying machine including a pair of parallel plates, rigidspacing'means disposed between'said plates, a pivot shaft journaled in corresponding portions of said plates, a pair of parallel members projecting laterally from said" shaft, one end of each parallel member being rigidly secured to the shaft, an end b-l'ockdisposed upon the otherends of said members soas to be spaced from said shaft by said members, said shaft and ehd block and intermediate parallel mem--' bers constituting a swiveling unit, and an intermediate block movably mounted upon said parallel members between said shaft and end block so as to be shiftable therebetween upon said -n1embers-. said intermediate block being also arranged to support a tooth.

an arm on said pivot comprising a pair of parallel rods secured at their inner extremities to said pivot, an end block secured to the other extremities of said rods, a tooth carriage mounted upon said rods, indicator means mounted upon said end block, a pair of rigid arms arranged upon one of the aforesaid plates and extending one' on each side thereof, and a bowed bar associated with said plates and enveloping a part of said end block and having a series of indicator marks along the face thereof to cooperate with said indicator means to determine positions of said block relative to said bar.

4:. A surveying machine including a base,

a post secured upon said base with a scribing stylus arm movably mounted upon said post and a chart table supported by said post above said stylus arm and adjustable mean-s mounted on said base andadapted to hold a tooth to be surveyed.

5. A surveying machine including a pair of spaced plates, a pivot shaft rotatably mounted between said plates, a pair of parallel rods secured to said pivot shaft intermediate the extremities thereof and provided at their outer extremities distant'from said pivot shaft with an end block, a tooth carriage slidablymounted upon said rods, a rotatable feed shaft arranged parallel with said rods and extending through said carriage and end block and at the latter provided with a head whereby it may be rotated to move said carriage. i

6. A surveying machine including a pair of spaced plates, a pivot shaft connecting said plates and mounted therein, a pair of rods secured at their inner extremities to said pivot shaft and projecting therefrom and secured at their outer extremities to a connecting block, a tooth carriage straddling said bars and provlded with means for retaining a tooth, a block mounted upon said bars within said carriage and a set screw in mountedupon said rods, a tooth carriage mov-' said carria e and a feedshaft 'ournalled in b 7 said pivot shaft, passing through said teed blockrand through said connecting end block and beyond the same and providedwith a head by which to rotate the shaft and move said feed block along said rods.

8. A surveying'machine including a movable tooth carriage provided witha socket, a barb'adapted to. support a tooth, and provided with a ball for said socket, and a set screw to secure said barband impaled tooth in any position in said socket.

9. A surveying machine including a pair of spaced plates having a plurality of pairs of rods pivotally mounted in said plates, a connecting block uniting the outer extremities of each respective pair of said rods, a tooth carriage movably mounted upon each pair of said rods, 1ndex pointers upon said end blocks,

projecting lugs disposed uponone of said plates and a curved bar extending from saidprojecting lugs about all said end blocks and having upon its face index marks to register with said index pointers to indicate relae tive positions of said respectively united pairs of rods. y

10. A dental surveying apparatus including a pair of spaced plates provided with a series of radially'arranged individual tooth supporting members pivoted therebetween,

a second pair of spaced plates similarly provided with radially arranged individual tooth supporting members, pivots in said plates for said tooth supporting members, a hinge block secured to said first pair of plates, a similar block secured to the second pair of plates and a bar hinged at each end to said hinge blocks and set screws to tighten said hinged portions and prevent relative movement of the respective parts.

11. A surveying machine of the class described, including a base, a pair of main support members mounted in opposed relation relative to each other on said base, a plurality of pivots mounted in each ofsaid main support members, a plurality of distinct tooth supports individually associated with and supported by said pivots, the individual tooth supports of one main support corresponding generally with those of the other main sup port so as to form two distinct groups, and also to be individually swingable about the respective pivots supporting the same, means adapting each individual tooth support to be movable vertically and horizontally and also tilted with respect to the other tooth support members, and means for individually moving said tooth support members at will in vertical and horizontal direction.

iis

12. A surveying machine of the class described, including a main supporting member, a plurality of adjustable supporting means arranged upon said main supporting member, tooth supports individually mounted upon said adjustable supporting means so as to be individually adjustable and movable With respect to each other, and means for actuating said adjustable supporting means at will in order to move any one tooth support While the other tooth supports remain stationary. V

Signed at 132 Nassau Street, in the borough of Manhattan, county of New York, city and State of New York, this 22nd day of May,

JOHANNES A. LINDELOV.

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